Preparation of originals for reproduction by printing or analogous processes



July 13, 1937. H. v. STRONG ET AL 2,087,130

- PREPARATION OF ORIGINALS FOR REPRODUCTION BY PRINTING OR ANALAGOUSPROCESSES Filed 001;. 25, 1955 2 Sheets-Sheet l July 13, 1937. H. v.STRONG ET AL PREPARATION OF ORIGINALS FOR REPRODUCTION BY PRINTING ORANALAGOUS.PROCESSES Filed Oct. 23, 1935 2 Sheets-Sheet 2 16 "1'1 r y-w-Tvaww. "P,

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Patented July 13, 1937 UNI-TED STATES PREPARATION OF ORIGINALS FORREPRO- DUCTION BY PRINTING OR ANALOGOUS PROCESSES Harold Vezey Strong,Ightham, and Rado Hagyi- Ristic, London, England Application October 23,1935, Serial No. 46,424 In Great Britain November 2, 1934 10 Claims.

This invention relates to the preparation of originals from which arereproduced by-a suitable printing process sheets of printed matter,primarily but not exclusively sheets of music, the appropriate musicsigns and symbols or other characters or matter to be printed beingimpressed manually upon a sheet of paper, which in the case of anoriginal for a music sheet bears the stave lines, by means of individualstamps or dies the position of each of which is determined or located bya movable guide; and the invention has for its objects, to expedite thepreparation of such originals and to enable them to be preparedaccurately without demanding a high degree of manual skill such as isonly acquired by years of experience, to eliminate the necessity forengraving metal plates for the reproduction of printed music, and tosimplify the process of producing music sheets by reducing the number ofsteps to be performed.

While the invention is defined and described hereafter in particularrelation to the preparation of printed music sheets, it is to beunderstood that its application is not limited thereto but may beextended to other printed matter, such for example as the insertion ofplace names or signs or symbols on maps or in other circumstanceswherein the accurate location ofletter press, signs, symbols orcharacters in relation to a sheet serving as an original for a printedreproduction is of paramount importance.

In the preparation of originals for printed sheets of music the locationof a note sign or other symbol correctly in relation to the stave linesis necessary, while the spacing correctly of the notes and symbolslengthwise of the stave and the sub-division of the stave into barsdemands skill knowledge and execution on account of certain factors uponwhich'the lay-out of the score depends, among which are the number ofbeats in a bar and the respective values of the notes in each bar, bothof which factors govern or influence the spacing of the notes in such amanner that a sheet of music shall present a correct musical picture toa person reading the music.

Firstly, according to the invention, the preparation of originals forthe printed reproduction, primarily, of music, is efiected byimpressions on a sheet of paper obtained from individual stamps or dies,each of which is supported by a movable guide socket rigidly normal tothe surface of the paper and which guide socket is provided with meansto ensure that any symbol or Sign shall be impressed on the paper in itscorrect relation to the stave lines. Thus the accurate positioning of anote sign, for example, whether on any given stave or leger line orbetween any given pair of stave or leger lines comprising the score, isdetermined.

Fundamentally; the spacing correctly oi the notes and symbols lengthwiseof the stave is based on the mathematical sub-division of the length ofa stave into units of space each of which bears a dimensionalrelationship to the width of a note symbol, preferably the head of acrotchet, that being the most commonly occurring symbol, (the maximumnumber of notes capable of being printed along a stave of given lengthwithout touching or overlapping being a known quantity) and theinvention also extends to the mechanical application of suchmathematical sub-division in order to determine the correct spacing ofthe notes along a stave according to their respective musical values.

Secondly therefore, the invention also embodies means whereby theaforesaid guide socket can be traversed intermittently lengthwise of astave by selected numbers of units of space determined by the respectivemusical values and also the number of the notes to be disposed alongthat stave. The extent of a unit of space is preferably less than thewidth of the head of a crotchet symbol, two or more such units beingslightly in excess of that width. Preferably provision is made for anaudible or a visual indication, or both, of the extent of eachnote-spacing traverse imparted to the guide socket.

In its elementary form,for the location of a note symbol on any givenstave or leger line or between any given pair of stave or leger lines,the aforesaid guide socket, whereof the size and configuration are inone embodiment such as to fit closely against the shank of a stamp ordie, may be integral with or may have attached to it a datum edge orpointer so positioned on the guide socket that when said edge or pointeris aligned with a stave line the guide socket is 10-" cated correctly toimpress a note directly on that line.

A duplicate guide socket may also be employed having a datum edge orpointer so disposed in relation to the guide socket that when alignedwith a stave line the guide socket is located correctly to impress anote intermediately of that stave line and the line next adjacent belowit.

Alternatively, and preferably, instead of employing twoseparate guidesockets with diiferently positioned datum edges or pointers, a singleguide socket is formed with or has attached to it a stepped datum edgeor pointer whereof one aligning edge isv appropriate to the positioncorresponding to a note on a stave line and the other aligning edge isappropriate to the position corresponding to a note between the stavelines.

In another and more elaborate form of the invention, the guide socketmay be mounted on a carriage slidable along a fixed or a movable guidebar laid horizontally over a hard wood board or metal plate on which thepaper bearing the stave lines to receive the necessary impressions isplaced and which board or plate is also provided vertically with -afixed or movable guide bar along one edge or margin, or said board orplate may be traversable vertically in relation to a stationary baseplate such as by rack and pinion mechanism; and the guide socket may besecured to a rack-rod or bar adapted to be moved, by means such as aknurled head, by amounts each equivalent to half the distance separatingadjacent stave or leger lines.

Alternatively, instead of being-mounted on a rack bar, the guide socketmay be serrated internally in correspondence with the stave lines andthe shank of the stamp or die may be tongued or, notched or grooved insucha manner as it fits into said serrations.

In thisform the guide socket may be serrated internally either along oneor both sides. When serrated along only one side, the uide socket maybemounted so as tobe displaceable by an amount equivalent to half thedistanceseparating adjacent stave lines. 1

When serrated along bothsides, the serrations are staggered by an amountequivalent to half the; distance separating adjacent stave lines and theopposite sides of the shank ofthe stamp or die are so grooved, notchedor tongued, that insertion of the stamp or die in one position into theguide socket determines the location of an impression onastave linewhile insertion of the stamp or die inthe reverse position determinesthe location of an impression-between adjacent stave lines. r i i 7Associated with the guide-socket or with the carriageon which it ismounted, there may be an adjustable index in order to facilitate theequal spacing of the impressions when that is necessary. I 7

For the purpose of traversing the guide socket intermittently lengthwiseof the stave, the guide socket and carriageare movable bodily along, theaforesaid guide bar and the extent of each displacement of the carriagein order to efiect the spacing of an impression may be regulated by pawland ratchet mechanism operated by a knurled head, or a lever, andwhereineach tooth on the ratchet wheel corresponds to one of theaforesaid units of space the arrangement-being such that theselected-number of units of 7 space are set upon the pawl andratchetmechanism the operation of which affords an audible indication ofthe number of units -concerned.and the mechanism being so'eonstructed asto permit the carriage to be slid along the guide bar only to the extentof the number of units of space for which the pawl andratchet mechanismhas been set. r

As the length of the stave is not uniform for all music sheets a scaleof unit spaces is preferably provided and is applied to the stave inorder to determine into how many unit spaceseach stave can besub-divided, and the number of unit spaces so ascertained is thendivided by the number of notes, symbols and signs to be disposed along astave thus obtaining the average number, together with any surplus, ofunit spaces allocatable to each note symbol or sign. I

To obtain the required musical picture, however, itwill not be possiblestrictly to adhere to this average, owing to differences in the musicalvalues of the notes, musical considerations necessitating the allocationsome times of more and sometimes of less than the average number of t qeto: a n te mbqlsq l s and any such departures from the average togetherwith the above mentioned surplus, if any, are disposed of throughout theremainder of the stave as the work progresses; means being provided toindi- -ca te all such departures from the average to- 'of one of itscomplementary die stamps bearing a note symbol. q

Fig. 2 is a side view of the guide socket shown in'Fig. 1, the diestamp, whereof the shank is broken away, being inserted therein,

Fig. 3 is a plan View of a complete apparatus, minus the die stamps,constructed according to the invention. I I Fig. 4 is a sectionalelevation on the line A, A, in Fig. 3, viewed in the direction of'thearrows.

Fig. 5 is a sectional elevation on the line B, B, in Fig. 3, viewed inthe direction of the arrows. I Fig. 6 is asectional elevation-on theline C, C, in Fig. 3, viewed in the direction of the arrows.

Fig. '7 isa side elevation viewed from the left hand of Fig. 3. v

Fig. 8, is a front and Fig. ,9 is aside view of a die stamp for a singlesymbol, and Figs. 10 and 11 are similar views of a die stamp comprisinga slug, while Figs. 12 and 13 are also similar views of a die stampcomp-rising separate type.

'Fig. 14 is a plan viewof a modified form of guide socket and Fig. 15 isa side view and underside plan view of a complementary die stampappropriate thereto, while Figs. 16 and 1'7 are similar views of asecond modified form of guide socket and complementary die stamp.

Figs. 8 to 1'7, inclusive, are drawn to a larger scale than thepreceding figures.

Referring firstly to Figs-l and 2, I 'is a metal tubular member ofrectangular cross-section from one lower side of which projectshorizontally a flat arm or blade 2 whereof the upper side is bevelledand is constructed with stepped datum'or aligning edges 3 and l thedistance between which is equivalent to half the distance separating twoadjacent music stave lines, and 5 is a steel or other suitable diestampbearing at its lower end an appropriate note or other sign orsymbol 6 in relief.

The die stamp 5 is adapted to 'be inked by any suitable means and to beapplied to a sheet of paper bearing stave lines by first locating thetubular member or socket i in the desired position and with either thedatum edge 3 or l coincident with one of the stave lines (according towhether the impression of the note is required on a'stave or leger lineor. between two stave or leger lines) and then pressing the die stamp 5manually through the socket l, in which it is a good sliding fit, toapply the ink on the note symbol to the surface of the paper.

The size and configuration of the socket I and die stamp 5 are notlimited to those illustrated but may vary, I such for instance as toaccommodate a die stamp bearing a succession however, the apparatus isalso to be' capable of determining mechanically the subdivision of astave for the purpose of ensuring the correct spacing of the notestherealong according to their respective musical values, the followingadditional mechanism is provided.

On the arbor carrying the pinion 2! a ratchet wheel 55 is fast and isengaged by a detent 55 carried pivotally by an angularly movable lever56 to which the tail of the detent 55 is anchored.

by a spring 51, said lever 56 being supported bythe aforesaid extension25 of the carriage i2 and. having its forward or inner extremity locatedbetween a fixed stop 58 and an adjustable screw stop 59 having a knurledhead es and working in a bracket 6! springing from the carriage l2, the

by moving the lever 56 in a clockwise direction with respect to theknurled head 22 the detent 55 can be drawn peripherally of the ratchetwheel overany desired number of teeth in passing over each of which thepressure of spring 51 causes 'the detent to make an audible sound. Thenby moving'the lever 56 in a counterclockwise direction with respect tothe knurled head 22 the detent 55 causes the ratchet wheel 54 and withit the pinion 2i to rotate and by the latters enof unit spaces (notshown) is the staves in order to determine into how many gagement withthe rack teeth 59 on the guide bar I2 the carriage it is traversed adetermined amount lengthwise of the guide bar l2; the extent of thislatter angular movement of the lever 56 being regulated by theadjustment ofthe stop 59.

The lever 55 may either. be moved the full angular distance permitted bythe stops 58 and 59, or it may be given a plurality of angulardisplacements each equal to the passage of the detent 55 over one ormore'teeth of the ratchet wheel 55.

Preferably'means, not shown, are-provided for affording on or inconnection with the knurled head 22 a visual indication of the extent ofeach angular displacement of the ratchet wheel t and hence of the numberof units of space by which the carriage it is shifted for each movementof the lever 56.

As a preliminary to preparing an original for the reproduction of sheetmusic, a sheet of paper i8 bearing stave lines (not shown in thedrawings) is firstciamped inpiace upon the rubber facing ii on theplaten is, by means of the bar 25 and clamping lever and then a scaleapplied to one of unit spaces each stave can be subdivided. Themanuscript to be reproduced'is then cast up and the number of notes,symbols and signs to be disposed along each stave ascertained; thenumber. of unit spaces allocatable per stave is then divided by theascertained number of notes, symbols and signs per stave, whereby theaverage number, togetherwith any surplus, of unit spaces allocatable toeach note, symbol or sign is arrived at.

The stop 59 is then adjusted in relation to the 'rect.

on said slide and on which carriage said. rack stop 58 so that the fullextent of angular movement of the lever 56 and hence also of the ratchetwheel 54 is equivalent to such average number of unit spaces allocatableto each individualv note, sign or symbol each of which is impressed 5 inturn, by a die stamp 3|, in its correct place lengthwise of the stave,by shifting the carriage therealong by moving the lever 56 firstclockwise then anti-clockwise in relation to the knurled head 22, thesocket I being adjusted vertically in relation to the stave lines, asmay be necessary, by manipulating the knurled head 9.

As the application to each note impression of theaverage number of unitspaces" would result in a purely mechanical subdivision of the staveirrespective of the correctness of the musical picture, account must betaken, during the application of the impressions, of the respectivemusical values of the notes and the artistic interpretation of the themein order to ensure that the music is set down grammatically cor- Forthis purpose discretionary additions to or subtractions from theaforesaid average number of unit spaces may be made by manipulation ofthe'pawl and ratchet traversing mechanism accordingly. 7 a

What we claim is: v

1. Apparatus for preparing, for reproducing by print, originals of musicand other printed matter, comprising a support for a plane sheet adaptedto receive impressions, and having transverse lines thereon relative towhich the printed matter must be positioned accurately,

at least one guide socket, an impressing die, said die being adapted tomove in a direction perpendicular to said sheet, means for temporarilyholding said impressing die in said guide in one position, hand-operatedmeans for pushing said impressing die against said impressing sheet,means for withdrawing said impressing die from said impressing sheet,means for adjusting said guide in a single step transversely of saidsheet a predetermined limited number of selected units of space, andmeans for adjusting said guide longitudinally of said sheet accuratelywith respect to either said lines or the spaces therebetween, regardlessof the position of the guide transversely of said sheet. 7

2. Apparatus for preparing, for reproducing by print, originals of musicand. other printed matter, comprising a support for a plane sheetadapted to receive impressions, and having transverse lines thereonrelative to which the printed matter must be positioned accurately, atleast one guide socket, an impressing die, said die being adapted tomove in a direction perpendicular to said sheet, means for temporarilyholding said impressing die in said guide in one position, hand-operatedmeans for pushing said'impressing die against said impressing sheet,means for withdrawing said impressing die from said impressing sheet, arack bar extending longitudinally of said sheet and on which bar saidguide socket is mounted, the said rack bar having teeth therealong, thepitch of which is equal to the unit distance through which said guidesocket is to be moved longitudinally of said sheet, a slide movabletransversely of said sheet, a guide along which said slide is movable, acarriage carried bar is mounted for movement relative thereto, and aspring on said carriage adapted to engage in the space between the teethof said rack bar.

3. Apparatus for preparing, for reproducing by said carriage. 7

print, originals of music and other printed matter, comprising asupportfor a plane sheet adapted to receive impressions, and havingtransverse lines thereon relative to which the printed matter must bepositioned accurately, at least one guide socket, an impressing die,said die being adapted to move in a direction perpendicular to saidsheet, means for temporarily holding said impressing die in said guidein one position, handoperated means for pushing said impressing dieagainst said impressing sheet, means for withdrawing said impressing diefrom said impress ing sheet, a rack bar extending longitudinally of saidsheet and on which bar said guide socket is mounted, a member removablymounted on the said rack bar and having teeth therealong, the pitch ofwhich is equal to the unit distance through which said guide socket isto be moved longitudinally of said sheet, a slide movable transverselyof said sheet, a guide along which said slide is movable, a carriagecarried on said slide and on which carriage said rack bar is mounted formovement-relative thereto, and a spring on said carriage adapted toengage in the space between the teeth of said rack bar.

4. Apparatus for preparing, for reproducing by print, originals of musicand other printed matter, comprising a support for a plane sheet adaptedto receive impressions, and having transverse lines thereon relative towhich the printed matter must be positioned accurately, at least oneguide socket, an impressing die, said die being adapted to move in adirection perpendicular to said sheet, means for temporarily holdingsaid impressing die in said guide in one position, handoperated meansfor pushing said impressing die against said impressing sheet, means forwithdrawing said impressing die from said impressing sheet, a rack barextending longitudinally of said sheet and on which bar said guidesocket is mounted, the said rack bar having a first set of teeth alongone side thereof and a second set of teeth along theother side thereof,the pitch of which second set of teeth is equal to the unit distancethrough which said guide socket is to be moved longitudinally of saidsheet, a slide movable transversely of said sheet, a guide along whichsaid slide is movable, a carriage carried on said slide and on whichcarriage said rack bar is mounted for movement relative thereto, aspring on said carriage adapted to engage in the spaces between the saidsecond set of teeth, a rotatably mounted pinion on said carriage meshingwith said first set of teeth, and means for rotating said pinion, tomove said rack bar relative to 5. Apparatus for preparing, forreproducing by print, originals of music and other printed matter,comprising a support for a plane sheet adapted to receive impressions,and having transverse lines thereon relative to which the printed mattermust be positioned accurately, at least one guide socket, an impressingdie, said die being adapted to move in a direction perpendicular to saidsheet, means for temporarily holding said impressing die in said guidein one position, handoperated means for pushing said impressing dieagainst said impressing sheet, means for withdrawing said impressing diefrom said impressing sheet, a rack bar extending longitudinally of saidsheet and on which bar said guide socket is mounted, the said rack barhaving a first set of teeth along one side thereof and a second set ofteeth along the other side thereof, the pitch of which second set ofteeth is equal to the unit distance through which said guide socket isto be moved longitudinally of said sheet, a slide movable transverselyof said sheet, a second rack bar along which said slide is movable andwhich has 6. Apparatus for preparing, for reproducing by print,originals of music and other printed matter, comprising a supportfor aplane sheet adapted to receive impressions, and having transverse linesthereon relative to which the printed matter must be positionedaccurately, at least one guide socket, an impressing die, said die beingadapted to move in a direction perpendicular to said sheet, means fortemporarily holding said impressing die in said guide in one position,hand-operated means for pushing said impressing die against saidimpressing sheet, means for withdrawing said impressing die from saidimpressing sheet, a rack bar extending longitudinally of said sheet andon which bar said guide socket is mounted, the said rack bar having afirst set of teeth along one side thereof, and a second set of teethalong the other side thereof, the pitch of which second set of teeth isequal to the unit distance through which said guide socket is to bemoved longitudinally of said sheet, a slide movable transversely of saidsheet, a second rack bar along which said slide is movable and which hasrack teeth along its length, a pinion rotatably mounted in said slideand meshing with the teeth of said second rack bar for adjusting saidslide transversely of said sheet, a ratchet wheel fast to: the saidpinion, a lever rotatable about the axis of said last-mentioned pinion,a detent pivoted on said lever and engaging said ratchet wheel, a springholding the detent in engagement with said ratchet wheel, a carriagecarried on said slide and on which carriage said first rack bar ismounted for relative movement, said lever being pivotally disposed onsaid carriage, a spring on said carriage adapted to engage in the spacesbetween said second set of teeth, a rotatably mounted pinion on saidcarriage meshing with said first set of teeth, and means for rotatingsaid last-mentioned pinion, to move said first rackbar relative to saidcarriage.

'7. Apparatus for preparing, for reproducing by print, originals ofmusic and other printed matter, comprising a support for a plane sheetadapted to receive impressions, and having transverse lines thereonrelative to which the printed matter must be positioned accurately, atleast one guide socket, an impressing die, said die being adapted tomove in a direction perpendicular to said sheet, means for temporarilyholding said impressing die in said guide in one position, hand-operatedmeans for pushing said impressing die against said impressing sheet,means for withdrawing said impressing die from said impressing sheet, arack bar extending longitudinally of said sheet and on which bar saidguide socket is mounted, the said rack bar having a first set of teethalong one side thereof, and a second set of teeth along the: other sidethereof,

socket is to be moved longitudinally of said sheet, a slide movabletransversely of said sheet, a second rack bar along which said slide ismovable and which has rack teeth along its length, a pinion rotatablymounted in said slide and meshing with the teeth of said second rack barfor adjusting said slide transversely of said sheet, a ratchet wheelfast to the said pinion, a

lever rotatable about the axis of said pinion, a

' gagement-with said ratchet wheel when desired,

"a carriage carried on said slide and on which carriage said first rackbar is mounted for relative movement, said lever being pivotallydisposed on said carriage, a spring on said carriage adapted to engagein the spaces between said second set of teeth, a rotatably mountedpinion on said carriage meshing with said first set of teeth, and

. means for rotating said last-mentioned pinion,

to move said first rack bar relative to said carriage.

8. Apparatus for preparing, for reproducing by print, originals of musicand other printed matter, comprising a support for a plane sheet adaptedto receive impressions, and having transverse lines thereon relative towhich the printed matter must be positioned accurately, at least oneguide socket, an impressing die, said die being adapted to move in adirection perpendicular to said sheet, means for temporarily holdingsaid impressing die in said guide in one position, hand-operated meansfor pushing said impressing die against said impressing sheet, means forwithdrawing said impressing die from said impressing sheet, means foradjusting said guide in a single step transversely of said sheet apredetermined limited number of selected units of space, and means foradjusting said guide longitudinally of said sheet accurately withrespect to either said lines or the spaces therebetween, regardless ofthe position of the guide transversely of said sheet, a rack barextending longitudinally of said sheet and on which bar said guidesocket is mounted, the said rack bar having a first set of teeth alongone side thereof, and a second set of teeth along the other sidethereof, the pitch of which second set of teeth is equal to the unitdistance through which said guide socket is to be moved longitudinallyof said sheet, a slide movable transversely of said sheet, a second rackbar along which said slide is movable and which has rack teeth along itslength, a pinion rotatably mounted in said slide and meshing with theteeth of said second rack bar for adjusting said slide transversely ofsaid slide,

a ratchet wheel fast to the said pinion, a lever rotatable about theaxis of said last-mentioned pinion, a detent pivoted on said lever andengaging said ratchet wheel, a spring holding the detent in engagementwith said ratchet wheel, a fixed stop on said slide, a bracket on saidslide, a second stop threaded through said slide, the said stops beingdisposed in the path of said lever and limiting the movement thereof, acarriage carried on said slide and on which carriage said first rack baris mounted for relative movement,

said lever being pivotally disposed on said carriage, a spring on saidcarriage adapted to engage in the spaces between said second set of thepitch of which second set of teeth is equal to the unit distance throughwhich said guide teeth, a rotatably mounted pinion on said carriagemeshing with said first set of teeth, and means for rotating saidlast-mentioned pinion, to move said first rack bar relative to saidcarria e.

9. Apparatus for preparing, for reproducing by print, originals of musicand other printed matter, comprising a support for a plane sheet adaptedto receive impressions, and having transverse lines thereon relative towhich the printed matter must be positioned accurately, at least oneguide socket, an impressing die, said die being adapted to move in adirection perpendicular to said sheet, means for temporarily holdingsaid impressing die in said guide in one position, hand-operated meansfor pushing said impressing die against said impressing sheet, means forwithdrawing said impressing die from said impressing sheet, a rack barextending longitudinally of said sheet and on which bar said guidesocket is mounted, the said rack bar having a first set of teeth alongone side thereof, and a second set of teeth along the other sidethereof, the pitch of which second set of teeth is equal to the unitdistance through which said guide socket is to be moved longitudinallyof said sheet, a slide movable transversely of said sheet, a second rackbar along which said slide is movable and which has rack teeth along itslength, a pinion rotatably mounted in said slide and meshing with theteeth of said second rack bar for adjusting said slide transversely ofsaid sheet, a ratchet wheel fast to, but removable from the said pinion,a lever rotatable about the axis of said last-mentioned pinion, a detentpivoted on said lever and engaging with said ratchet wheel, a springholding the detent in engagement with said ratchet wheel, a carriagecarried on said slide and on which carriage said first rack bar ismounted for relative movement, said lever being pivotally disposed onsaid carriage, a spring on said carriage adapted to engage in the spacesbetween said second set of teeth, a rotatably mounted pinion on saidcarriage meshing with said first set of teeth, and means for rotatingsaid last-mentioned pinion, to move said first rack bar relative to saidcarriage.

10. Apparatus for preparing for reproducing by print, originals of musicand other printed matter, comprising a support for a plane sheet adaptedto receive impressions and having transverse lines thereon relative towhich the printed matter must be positioned accurately, a plurality ofguide sockets, an impressing die, said die being adapted to move in adirection perpendicular to said sheet,

means for temporarily holding said impressing die in a selected one ofsaid guides in one position, hand-operated means for pushing saidimpressing die against said impressing sheet, means for withdrawing saidimpressing die from said impressing sheet, a rack bar extendinglongitudinally of said sheet and on whichbar said guide sockets aremounted so as to be movable and adjustable relative to each other, thesaid rack bar having teeth therealong, the pitch of which is equal tothe unit distance through which said guide socket is to be movedlongitudinally of said sheet, a slide movable transversely of saidsheet, a guide along which said slide is movable, a carriage carried onsaid slide and on which carriage said rack bar is mounted for movementrelative thereto, and a spring on said carriage adapted to engage in thespace between the teeth of said rack bar.

HAROLD VEZEY STRONG. RADO HAGYI-RISTIC.

